package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.UUID;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex((password+employee.getSalt()).getBytes());
        //password = DigestUtils.md5DigestAsHex(password.getBytes());

        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }


    /**
     * 员工新增
     * @param employeeDTO
     */
    @Override
    public void add(EmployeeDTO employeeDTO) {
         Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        employee.setCreateUser(1L);
        employee.setUpdateUser(1L);
        //
        String salt = UUID.randomUUID().toString().replace("-", " ");
        String password = DigestUtils.md5DigestAsHex((PasswordConstant.DEFAULT_PASSWORD + salt).getBytes());

        employee.setPassword(password);
        employee.setSalt(salt);
        employeeMapper.insert(employee);
    }


    /**
     * 分页查询
     * @param pageTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO pageTO) {
        //使用分页插件，设置分页参数
        PageHelper.startPage(pageTO.getPage(),pageTO.getPageSize());
        //执行条件查询，查询page对象，包含页的数据和总数，Page可以查询总数
       Page<Employee> employeePageList= employeeMapper.getNamePage(pageTO.getName());

       //封装分页结果并返回
        PageResult pa = new PageResult();
        pa.setRecords(employeePageList.getResult());
        pa.setTotal(employeePageList.getTotal());

        return pa;
    }

    /**
     * 启动禁用员工账号
     * @param status
     * @param id
     */
    @Override
    public void updateStatus(Integer status, Long id) {
        Employee buildStatus = Employee.builder()
                .status(status)
                .id(id).build();

        /*Employee employee = new Employee();
        employee.setStatus(status);
        employee.setId(id);
        employeeMapper.updateStatus(employee);*/
        employeeMapper.updateStatus(buildStatus);
    }


    /**
     * id查询
     * @param id
     * @return
     */
    @Override
    public Employee getId(Long id) {

        Employee employee = employeeMapper.getId(id);
        return employee;
    }

    /**
     * 员工信息修改
     * @param employeeDTO
     */
    @Override
    public void updateEmp(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);


        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(employee.getId());
        employeeMapper.updateEmp(employee);
    }


}
